-89.06% is the change from 512 to 56
Calculation steps:
[( 56 - 512 ) ÷ 512] x 100 = -89.06%
Formula
Percentage change = [(56 - 512) / 512] x 100
Subtract the new number by the original number
56 - 512 = -456
-456 ÷ 512 = -0.890625
-0.890625 x 100 = -89.06%